Water scorpion : See Nepa.

Example:


Taxonomy
scorpions, insects, abdomen, wings, Adults, Nepa, oxygen, eggs, siphon, water scorpion, air bubble, water surface, rostrum, pairs, forelegs, prey, North America, Ranatra fusca.

Defination from the web:
water scorpions are likewise adapted for grasping prey, but lack ... Within the order Hemiptera, water scorpions belong to the sub-order Heteroptera ('different wings') in which the anterior wings are stiffened to ...